<template>
    <el-container class="home-container">
        <!-- 头部区域 -->
  <el-header>
    <div>
        <img src="../assets/heima.png" alt="">
        <span>电商后台管理系统</span>
    </div>
    <el-button type="info" @click="logout">退出登录</el-button>
    </el-header>
  <!-- 页面主体区域 -->
  <el-container>
    <!-- 侧边栏 -->
    <el-aside :width="isCollapse ? '64px':'200px' ">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409EFF" unique-opened 
      :collapse="isCollapse"
      :collapse-transition="false"
      router
      :default-active="activePath">
       <!-- 一级菜单 -->
      <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
        <!-- 一级菜单的模板 -->
        <template slot="title">
            <!-- 图标 -->
          <i :class="iconObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{ item.authName }}</span>
        </template>
       <!-- 二级菜单 -->
        <el-menu-item :index="'/' + subItem.path"  v-for="subItem in item.children" 
        :key="subItem.id" @click="saveNavState('/' + subItem.path)">
            <template slot="title">
            <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{subItem.authName}}</span>

        </template>

        </el-menu-item>
      </el-submenu>
    </el-menu>
    </el-aside>
    <!-- 右侧内容主体 -->
    <el-main>
        <!-- 路由占位符 -->
          <router-view></router-view>

    </el-main>
  </el-container>
</el-container>

</template>

<script>
    export default {
        data(){
            return{
                menulist:[],
                iconObj:{
                    '125':'iconfont icon-user',
                    '103':'iconfont icon-tijikongjian',
                    '101':'iconfont icon-shangpin',
                    '102':'iconfont icon-danju',
                    '145':'iconfont icon-baobiao',
                },
                isCollapse:false,
                //被激活的链接地址
                activePath:''
            }
        },
        created(){
            this.getMenuList()
            this.activePath = window.sessionStorage.getItem('activePath')
        },
        methods:{
            logout(){
                window.sessionStorage.clear();
                this.$router.push('/login')
            },
            async getMenuList(){
                const {data:res} = await this.$http.get('menus')
                if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
                this.menulist = res.data
                console.log(res);
            },
            // 点击按钮切换折叠张开
            toggleCollapse(){
              this.isCollapse = !this.isCollapse
            },
            //保存链接的激活状态
            saveNavState(activePath){
                window.sessionStorage.setItem('activePath',activePath)
                this.activePath = activePath
            }
        }
    };
</script>

<style lang="less" scoped>
.home-container{
height: 100%;
}
.el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    >div{
        display: flex;
        align-items: center;
        span{
            margin-left: 15px;
        }
    }
}
.el-aside{
    background-color: #333744;
    .el-menu{
        border-right: none;
    }
}
.el-main{
    background-color: #eaedf1;
}
.iconfont{
    margin-right: 10px;
}

.toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color:#fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>